Home Postcode finder TAS Great Bay Great Bay postcode TAS Great Bay is a locality in Tasmania covered by postcode 7150. Postcode 7150 State or territory Tasmania (TAS) Region Tasmania Add a free Great Bay business listing Be the first listing in Great Bay Common questionsWhat is the postcode for Great Bay?Great Bay, TAS has the postcode 7150.What state is Great Bay in?Great Bay is in Tasmania (TAS).Does postcode 7150 cover more than one suburb?Yes. Postcode 7150 covers 19 localities, so the postcode alone does not identify Great Bay. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.